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Radial cleavage - Metazoa
Radial cleavage produces tiers or layers of cells one on top of another. Radial cleavage is also said to be indeterminate or regulative because each of the blastomeres of the early embryo, if separated from the other, can regulate its development and form a complete well proportioned embryo. This happens because the blastomeres are equipotent; their final fate is not yet determined and there is no definite relation between the position of early blastomeres and specific tissue it will form in the embryo (hence indeterminate). This type of cleavage is found in some cnidarianes, echinoderms and all chordates.
Figure: Radial cleavage shown at 4, 8 and 16 cell stage
Photoreceptor - Phototropism The molecular nature of the photoreceptor is unsolved. Initially in the 1930s, some form of carotenoid was thought to be the phototropic receptor.
Q. How is arthropod reproduction characterized? Reproduction in beings of the phylum Arthropoda is sexual with larval stage in some insects and crustaceans (arachnids) present
Assume you were given a mixture consisting of one molecule each of all possible sequences of a smallish protein of molecular weight 4800 daltons. If the average molecular weight of
Pulmonary Valvotomy on Cardio Pulmonary Bypass : Patient is connected to cardio pulmonary bypass using ascending aortic cannula and single 01- double (preferred) ven
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The first ever australopithecine fossil was found in 1924 at Taung, South Africa. It was the skull of a 6 year old child showing a mixture of human and ape like features. This a
Medical Nutrition Therapy Medical Nutrition Therapy (MNT) is defined as the assessment of the nutritional status of a client followed by nutrition therapy ranging Pon
Setting priorities for action: It is not enough for our actions to be coordinated with events in the outside world; they must reflect our internal needs. Pain can flood conscious
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